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Illumination device and liquid crystal display apparatus using the same

A technology of lighting device and light irradiating surface, which is applied to the parts of lighting device, lighting device, fixed lighting device, etc. Effect

Inactive Publication Date: 2013-10-30
HITACHT MAXELL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since fluorescent tubes contain mercury vapor inside, they have a large impact on the global environment, and their use tends to be banned in Europe and other places.

Method used

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  • Illumination device and liquid crystal display apparatus using the same
  • Illumination device and liquid crystal display apparatus using the same
  • Illumination device and liquid crystal display apparatus using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] First, for the overall configuration of the lighting device to which the present embodiment is applied to the video display device, refer to Figure 1 ~ Figure 3 An outline thereof will be described. figure 1 It is an exploded view showing the outline of the overall configuration of a liquid crystal display (LCD) having a lighting device according to an embodiment of the present invention, figure 2 is a cross-sectional view of the lighting device of this embodiment, perpendicular to the light irradiation surface and parallel to the optical axis direction of the LED, image 3 It is a cross-sectional view of the internal structure of the backlight block and the liquid crystal display including the backlight block of this embodiment.

[0053] picture figure 1 As shown, a transmissive liquid crystal display (LCD) 100 using a liquid crystal panel 1 that is popular as a display for displaying images includes, as its overall configuration, a liquid crystal panel 1 ; a diffu...

Embodiment 2

[0103] As a method of realizing the line symmetry of the luminance distribution with respect to the center of the lighting device, it is not necessary to insist on arranging the LEDs 7 facing each other, and it can also be realized by controlling the power supplied to each backlight block for each block. The details are shown in the description below.

[0104] Figure 10 It is an explanatory diagram showing power applied to each backlight block of the lighting device according to this embodiment. The backlight used is configured as a single-direction / equal-spaced arrangement in Fig. 8(a), and its applied power characteristic is (a)'. As a comparison, the applied power characteristic is (b) with the opposite / unequal pitch arrangement of FIG. 8(b) used in Example 1.

[0105] In the single-direction / equal-pitch arrangement in FIG. Positions 3 and 4 set the peak value of the ON power, and the power applied to the light source at light source position 8 is set to be smaller than...

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PUM

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Abstract

The invention provides an illumination device and liquid crystal display apparatus using the same. The illumination device has a simple configuration and is thin. A plurality of backlight blocks are configured by being juxtaposed in the plane direction of an illumination device and include a bidirectional backlight block. Light sources are formed on both lateral sides of the bidirectional backlight block in the direction of the axes of emission of the light sources, the light sources formed on one lateral side are arranged so that light is emitted in the direction toward the light sources formed on the other lateral side, the light sources formed on the other lateral side are arranged so that light is emitted in the direction toward the light sources formed on the one lateral side, and the bidirectional backlight block is arranged in the center part of the illumination device in the direction of the axes of emission of the light sources.

Description

technical field [0001] The present invention relates to a lighting device using, for example, a light emitting diode (LED) as a light source and a liquid crystal display device using the same, and more particularly to a lighting device that can improve the utilization efficiency of light from the light source and obtain high-quality images, and a liquid crystal display device using the same display device. Background technique [0002] Liquid crystal display devices are used in various fields because they can be thinner and lighter. Since the liquid crystal itself cannot emit light, an illuminating device (hereinafter also referred to as a backlight) is arranged on the back of the liquid crystal display panel. In a liquid crystal display device with a relatively large screen, such as a television display device, a fluorescent tube is used as a light source. However, since fluorescent tubes contain mercury vapor inside, they have a large impact on the global environment, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V19/00G02F1/13357F21Y101/02
CPCG02F1/133603G02F1/133602F21V13/04
Inventor 津村诚大内敏久保田秀直田边将行
Owner HITACHT MAXELL LTD